let n : any = null;
console.log (n);
let b : boolean = false;
console.log (b);
let numeric1 : number = 123;
console.log (numeric1);
let numeric2 : number = 3.45;
console.log (numeric2);
let numeric3 : number = 0xFF;
console.log (numeric3);
let s : string = "abc";
console.log (s);
